Introducing systemd.eclass - a helper eclass to handle systemd unit installation.

1 files changed, 102 insertions, 0 deletions

diff --git a/eclass/systemd.eclass b/eclass/systemd.eclass
new file mode 100644
index 000000000000..386686395731
--- /dev/null
+++ b/eclass/systemd.eclass
@@ -0,0 +1,102 @@
+# Copyright 1999-2011 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/eclass/systemd.eclass,v 1.1 2011/05/04 10:53:35 mgorny Exp $
+
+# @ECLASS: systemd.eclass
+# @MAINTAINER:
+# mgorny@gentoo.org
+# @BLURB: helper functions to install systemd units
+# @DESCRIPTION:
+# This eclass provides a set of functions to install unit files for
+# sys-apps/systemd within ebuilds.
+# @EXAMPLE:
+#
+# @CODE
+# inherit autotools-utils systemd
+# 
+# src_configure() {
+#	local myeconfargs=(
+#		--enable-foo
+#		--disable-bar
+#	)
+#
+#	systemd_to_myeconfargs
+#	autotools-utils_src_configure
+# }
+# @CODE
+
+inherit multilib
+
+case ${EAPI:-0} in
+	0|1|2|3|4) ;;
+	*) die "${ECLASS}.eclass API in EAPI ${EAPI} not yet established."
+esac
+
+# @FUNCTION: systemd_get_unitdir
+# @DESCRIPTION:
+# Output the path for the systemd unit directory (not including ${D}).
+# This function always succeeds, even if systemd is not installed.
+systemd_get_unitdir() {
+	debug-print-function ${FUNCNAME} "${@}"
+
+	echo -n /lib/systemd/system
+}
+
+# @FUNCTION: systemd_dounit
+# @USAGE: unit1 [...]
+# @DESCRIPTION:
+# Install systemd unit(s). Uses doins, thus it is fatal in EAPI 4
+# and non-fatal in earlier EAPIs.
+systemd_dounit() {
+	debug-print-function ${FUNCNAME} "${@}"
+
+	(
+		insinto "$(systemd_get_unitdir)"
+		doins "${@}"
+	)
+}
+
+# @FUNCTION: systemd_enable_service
+# @USAGE: target service
+# @DESCRIPTION:
+# Enable service in desired target, e.g. install a symlink for it.
+# Uses dosym, thus it is fatal in EAPI 4 and non-fatal in earlier
+# EAPIs.
+systemd_enable_service() {
+	debug-print-function ${FUNCNAME} "${@}"
+
+	[[ ${#} -eq 2 ]] || die "Synopsis: systemd_enable_service target service"
+
+	local target=${1}
+	local service=${2}
+	local ud=$(systemd_get_unitdir)
+
+	dodir "${ud}"/"${target}".wants && \
+	dosym ../"${service}" "${ud}"/"${target}".wants
+}
+
+# @FUNCTION: systemd_with_unitdir
+# @DESCRIPTION:
+# Output '--with-systemdsystemunitdir' as expected by systemd-aware configure
+# scripts. This function always succeeds. Its output may be quoted in order
+# to preserve whitespace in paths. systemd_to_myeconfargs() is preferred over
+# this function.
+systemd_with_unitdir() {
+	debug-print-function ${FUNCNAME} "${@}"
+
+	echo -n --with-systemdsystemunitdir="$(systemd_get_unitdir)"
+}
+
+# @FUNCTION: systemd_to_myeconfargs
+# @DESCRIPTION:
+# Add '--with-systemdsystemunitdir' as expected by systemd-aware configure
+# scripts to the myeconfargs variable used by autotools-utils eclass. Handles
+# quoting automatically.
+systemd_to_myeconfargs() {
+	debug-print-function ${FUNCNAME} "${@}"
+
+	myeconfargs=(
+		"${myeconfargs[@]}"
+		--with-systemdsystemunitdir="$(systemd_get_unitdir)"
+	)
+}